Glass gasket strip



Jan. 1, 1935. H. WALKER 1,986,694 r GLASS GAKET STRIP Filed Aprii 13,1954 'INVENTOR. Charles fl. l Kal/hr.

ATTORNEYS.

Patented 1.... 1', 1935 I a i 5 ,93 69 UNITED STATES PATENT ome times3122;... a puizrafru ifi tr sfi 725.364

- .10 Claims. (01. 159-76).

The invention relates to gaskets and it has compress the walls of thefelt through pressure particular relation toa gaskehmaterial adapted onthe glass. 7 to be placed in'a metal channel for receiving the Oneobject of the present invention is to proedge of a window glass or thehke such as used vide a gasket for sealing the edge of a glass in 5 inautomobiles. 1

At the present time, and particularly in autoand which is of suchconstruction that the edge mobile constructions, it is common practiceto of the gla s is p rman n ly sealed n 'i ainmount Windshields or otherglass panels in metal. in d i htly in the metal channel. frames wherethe frame 1;; hannel sha in Another object of theinventionis to providecross section. and receivesthe edge of the glass. gesket 01 thischaracter W h has certain 10 In constructions. of this character it is.practirecovery c i s. ell-that after the gasket cally. necessary. toemploy some form or strip is installed it recovers or'swells so tospeak, so between the edge of the;- glass and; the channel as to fillany vcidscr spaces to the e that the 7 so as to prevent rattling of theglass in the frame. glass w ll b v n m r htly h d in the m l l5 and tosealit in the channel. While strips have n l egailtst lccseness rattlingand a Very a metal channel which may be readily installed 5 b enprovided for this purpose and are commonly positive sealing engagementwill be obtained beused,'it has-been diflicult to positively andpertween the lass and metal channel. manentlyseal the edge of theglassin the ehan- Another object of the invention is to provide nel andit is quite common tofind that we er a gasket of this character which.is effectively 2o. leaks through between 'the edge of the glass andbonded to the glass and interior of the metal the metal frame. Thisleakage is-particularly ha n l, h y firmly anchoring th e 01 grit tooccur' indriving rain storms'or where h glass i h lat rhe automobile isbeing driven rather rapidly in Another object 0! the inv n is to P vi ea rainy weather and .the water is thrown against gasket material as anarticle of manufacture in the glass panel with considerable force. Ithas flat strip form which may readily be wound 25 also been difficult toprovide astrip which can p ripherally 0f the edge of the glass n hen beeasily disposed within the metal channel folded'over the sides of theglass around the edge and around the edge of the glass while still -obtoform a'- channel gasket adapted to positively taining a satisfactorysealing relation. Ordinary seal he e 0! the glass vin the metal channel;vulcanized rubber has been employed for this Another objectof-the'inventionis' to-provide 30 ,purpose but, unless the gasket isannular and 'an improved gasket material which eificiently extendsentirely around the edge of the glass, it serves as a cushion betweenthe-glass and the is diflicult to obtain a proper fit between'the endsmetal channel in which the glass is mounted. and to seal the glass atthe point where the-ends Another object of the invention is to provideare located. Furthermore, ordinary vulcanized a. method of manufacturinga rubber gasket of rubber is an incompressible material and for thislaminated construction. reason, it is diflicult to manipulate it andobtain Other objects of the invention will become ap-' a closefitbetween the glass, gasket and metal P n m he followi p i n. he awtchannel and particularly where there are variai118 relating h the claimshereinafter 40 tions in dimensions as will invariably occur in setforth- 40 ..manufacture Aside from variations in For a betterunderstanding of the invention, sions that will occur in manufacturingboth the reference may be had the acmmpanying draw lass and metalchannel, it is quite usual to have ing wherein:

. metal channels and glasses of slightly difierent Figure 1 illustratesa glass mounted m a metaldimensionsto be used on different body stylesframe, 01 channel n dc s n, wherein 45 or differentmodels and in thesecases itis practhe edge of the'gla is se -l y using a gasket ticallynecessary to provide a different rubber cons t d according to d form ofthe invengasket for each construction. tion.

Felt gaskets have been employed but these are Fig. 2 is across-sectional view on a larger usually i efilcient and do not seal theedge of scale, taken substantially along the line 2- -.-2 of 50the-glass in the-metal channel in asatisfactory Fig. l. 1

and durable manner. Furthermore, these con- Fig; 3 i a fragm y Vie'ges'ket nstructions are usually around the edge I of the structedaccording to one form of the invention glass in the'form of a strip andproblems are as initially furnished and prior to its applicationinvolved in preventing leakage -of-water between to the edge of theglass and to the metalchannel. .55

the ends of the strip. Furthermore, felt gaskets Fig. 4 is a fragmentaryviewsimilar to Fig. 3, usually. allow some leakage and loose movementillustrating a gasket material constructed accordof the glass in themetal channel, particularly ing to another form of the invention. afterthe automobile has been inuse for a while Fig. 5 is a cross-sectionalview illustrating a and forces such as wind pressure has acted tolaminated construction of gasket material. 60

' channel of the frame during which the side porcertain degree ofcompressibility.

In Fig. i the metal frame member is indicated at and the glass thereinis indicated at 11 and it is to be understood that this frame may.

be varied in shapeiand that it may be used in automobiles or otherplaces-where window panels maybe employed. As shown best by Fig. 2, theframe "10 cBmprises side members of channel shapedcross section aridthe-edge of the glass projects into the channel. A gasket constructedaccording toone form-ofthe invention is indi cated at 1 2 and-is ofchannel formation and is disposed between the metal channel and the.edge of the glass. Metal frames of this character are applied around theedge of the glass in various ways and the sides may be initiallyseparated and then joined together at the corners or the frame may beapplied in other ways such as by having three sides integrallyconnected, inserting the glass from the open fourthside and thenapplying the fourth side of the fr e.- Various other ways of placingframes -on' the edges of a glass panel will be readily understood bythose skilled in this art. i

The gasket 12 may originally be manufactured in the form of astripindicated at '14 in Fig. 3 which is of such width that when placedaround the edge of the'glass as shown by Fig. 2, it forms a channelofproper dimensions. Pursuant to one form of the invention, the gasketis constructed of crude. and uncuredrubberwhich is mixed with cotton andit has been found that a.

mixture of 30% cotton by volume is highly satisfactory. The-cotton maybe introducedinto the crude and uncured rubber by milling operations orother mixing processes well understood in the rubber industry. and thismilling or mixing is continued until the cotton fibers are of the colorof the rubber and invisible. After the proper mixture has been obtained,the compound or composition may be passed through calendaring,

rolls for obtaining a fiat sheet and then this sheet may be slit so asto obtain'strips of proper widths such as shownby Fig. 3.

The cotton introduces a compressible ingreclient and, when mixed'withthe crude and uncured rubber, provides a material which has '9. Usingthe crude and uncured rubber enables obtaining a tacky or, somewhatsticky material, although this tacky condition is not such that thematerial cannot be handled manually as it ordinarily will not stick tothe hand. As a matter of fact, the

tacky condition is suchthat the material will not.

readily stick to the metal or glass without applying a little pressureand thisv enables handling of the material and initially applying itaround the glass and positioning. it in the channel without difliculty..It has been found that this ma-. terial has very decided recoverycharacteristics and by this is meant that when the ,;material iscompressed, it tends to recover its-original condition although whencompressed this recovery is not instantaneous.

In applying a gasket of this character, the strip is slightly longerthan the periphery ofthe glass to be used and then the strip isperipherally wound around the edge face of the glass and the endsthereof are overlapped and pressed together, in which position they-aremaintained by a natural bond which occurs. During this operation theedges of the-strip may flex somewhat toward the sides of the glass. Thenthe glass and gasket so mounted thereon are slidably moved into thetions of the strip are pressed against the sides of the glass, so thatthe assembly becomes like that shown by Fig. 2. In the final assembly,the walls of the gasket become bonded to both the metal channel and theglass. 1

Use of the cotton fibers gives a desired inextensibility to the materialso that when the strip is wound around the edge face of the glass, it

does not stretch in an undesirable manner and permitsthe workmen toquickly apply the strip without tearing or elongating the strip in anundesirable way. The overlapping ends of the strip may be readilypressed together so that the final thickness of the overlapping portionsis not such as to. interfere with application of the metal frame. Whenthe channel metal frame is applied, it has been found that by applying alittle Vaseline or cup grease to the gasket provides a of the material.

As shown by Fig. 4 the gasket is constructed by applying the rubber andcotton mixture to the sides of a thin strip of woven fabric 16 servingas.

a backing layer. Under certain circumstances,

this construction of the gasket may be employed and, if desired, therubber and cotton material might be placed only on one side ofthefabric.

The construction shown by Fig. 5 is of laminated character and as showntwo laminae 18 and 19' are provided although morathan two may be used.It has been determined that the laminated construction provides a bettercushioning medium between the glass and channel and it also seems tobesomewhat more flexible which facilitates its manipulation andapplication.

In manufacturing this construction, a batch of the mixed rubber andcottonmay be fed between two heated calender rolls one of which has aslightly greater peripheral speed than the other and the. sheetmaterialafter it passes between the rolls may be directed around the,roll havingthe greater peripheral speed and then passed between thisuoll and athird heated roll operating .at the same peripheral speed. During'thisprocess, it seems that the surface of the sheet which contacts with thefirst and slower roll is roughened to a certain extent whereas the othersurface becomes smooth. Then two of the sheets thus manufactured may bepassed in superposed relation with their rough surfaces adjacent,between other calender rolls operating at the same peripheral speed andthis causes the sheets to bebonded together. 1 a.

It has beenstated that the laminated structure has better cushioningproperties and while various factors may govern obtaining this result,it seems that in bonding the two rough surfaces minute voids may beobtained in which air may be trapped and that this increases thecushioning properties of the material. While this seems probable, thereason the laminated material has better cushioning properties andgreater fiexibility is not definitely known. It is apparent that thelaminated structure in presenting smooth exposed surfaces, facilitatesapplication of the strips in the metal channels.

Once a gasket constructed according to the invention is in place, therecovery characteristics of the rubber causes it to fill any and allvoids as it swells, soto speak, and this provides a positive sealbetween the channel and the edge of the itself to the channel and glassin such a way that the latter is firmly anchored against looseness.

modifications may be made without Again the striphas improved cushioningproperties that avoid breakageof the glass by vibration or the like. Itmay be mentioned also that the strip as provided always reveals a darkedge or edge having the color of the rubber and" that even though cottonis employed, it is practically.

invisible. Even when the material is cut, the cotton does not becomevisible and the edge is smooth and not frayed.

Additionally, it has been found that gasket material constructedaccording to the invention has expansive and contractile characteristicsthat cause it to expand and contract approximately with the expansionand contraction of the channel and glass, thereby insuring a uniformmounting under varying atmospheric and climatic conditions. v

Although more than one form of the invention has been illustrated anddescribed in detail, it will be apparent to those skilled in the artthat various from the scope of the appended claims.

What is claimed is:

1. In combination, a metal channel for receiving the edge of a glass, aglass in the channel, and a channel shape'gasket material within themetal channel and receiving the edge of the glass, said gasket materialcomprising an uncurediiubber composition.

2. In combination, a metal channel for receiving the edge of a glass, aglass in the channel, and

a channel shape gasketmaterial within the metal channel and receivingthe edge of the glass, said 'gasket material comprisinga mixture ofuncured rubber and fibrous material.

3. In combination, a metal channel for receiving the edgeof a glass, aglass in the channel, and a channel shape gasket material within themetal channel and receiving the edge of the glass, said gasket materialcomprising a mixture of uncured rubber and cotton fibers.

4. Incombination, a metal channel for receivdeparting 3 ing the edgeoi.- a glass, a glass in the channel, and a channel shape gasketmaterial within the metal channel and receiving the edge of the glass,said gasket material comprising a backing coated with uncured rubber. vr

5. In combination, a metal channel for receiving the edge of a glass, aglass in the channel, and a channel shape gasket material within themetal channel and receiving the edge. of the glass, said gasket materialcomprising a fabric backing coated with uncured rubber.

6. In combination, a metal channel for receiving the edge of a glass, aglass in the channel, and a channel shape gasket material within themetal channel and receiving the edge of the glass, said gasket materialcomprising a fabric backing'coated with a mixture of uncured rubberandcotton fibers. v

j 7. In combination, a metal channel for receiving the edge of, a glass,a glass in the channel, and a channel shape gasket material within themetal 'channel and receiving the edge of the glass, said gasket materialcomprising an uncured rubber composition, and means for reinforcing thecomposition so as to decrease its extensibility.

8. The combination with a channel and a'giass having its edge disposedin the channel of a gasket strip of channel shape disposed in the firstchannel and receiving the edge of the glass, said gasket. stripcomprising a fabric coated on one surface with uncured rubber.

9. A gasket strip adapted to be secured to one element and to receive anadjoining element such as the edge of a glass to bond the same thereto,said gasket strip comprising uncured rubber and fibrous. material.

a "channel shaped gasket material within the metal channel and receivingthe edge of the glass,

- l0. In combination, a metal channel for mew I ing the edge of a glass,a glass in the channel and v said gasket material comprisingsuperimposed andwbonded strips otan uncured rubber composition.

CHARLES H. warm,

